process for the manufacture of a minles leather velvet

摘要

The process comprises holding for two days in containing solution addition of paste with repeated shaking, and washing with running water. Decalcification based on sulphate of ammonia, treatment based on sodium chloride and chromium trioxide treatment and further holding in solution for two days, precede neutralis-ation using calcium formiate based agent. Final washing at 35-55 and staining at 55 deg. C complete the work cycle.